/*Reads the next packet from pcap_next() and validates the FCS. */
unsigned char *next_packet(struct pcap_pkthdr *header)
{
const unsigned char *packet = NULL;
struct pcap_pkthdr *pkt_header;
static int warning_shown = 0;
int status;
/* Loop until we get a valid packet, or until we run out of packets */
while((status = pcap_next_ex(get_handle(), &pkt_header, &packet)) == 1 || !status)
{
if(!status) continue; /* timeout */
memcpy(header, pkt_header, sizeof(*header));
if(get_validate_fcs() && !check_fcs(packet, header->len)) {
if(!warning_shown)
cprintf(INFO, "[!] Found packet with bad FCS, skipping...\n");
warning_shown = 1;
continue;
}
break;
}
return (void*)packet;
}
/*Reads the next packet from pcap_next() and validates the FCS. */
const u_char *next_packet(struct pcap_pkthdr *header)
{
const u_char *packet = NULL;
/* Loop until we get a valid packet, or until we run out of packets */
#ifdef __APPLE__
struct pcap_pkthdr *pkt_header = NULL;
int status = 1;
while ((status = pcap_next_ex(get_handle(), &pkt_header, &packet)) == 1 || status == 0) // status == 0 indicates timeout
#else
while((packet = pcap_next(get_handle(), header)) != NULL)
#endif
{
#ifdef __APPLE__
if (status == 0) continue;
memcpy(header, pkt_header, sizeof(*header));
#endif
if(get_validate_fcs())
{
if(check_fcs(packet, header->len))
{
break;
}
else
{
#ifndef __APPLE__
cprintf(INFO, "[!] Found packet with bad FCS, skipping...\n");
#endif
}
}
else
{
break;
}
}
return packet;
}
